body {
  /* background: radial-gradient(200% 100% at bottom center, #f7f7b6, #e96f92, #75517d, #1b2947);
  background: radial-gradient(220% 105% at top center, #1b2947 10%, #75517d 40%, #e96f92 65%, #f7f7b6); */
  background: linear-gradient(400deg, #060c21, #00bcd4);
  background-attachment: fixed;
  overflow: hidden;
  animation: fade-in;
  /*动画名称*/
  animation-duration: 1.5s;
  /*动画持续时间*/
  -webkit-animation: fade-in 1.5s;
  /*针对webkit内核*/
}
@keyframes fade-in {
  0% {
      opacity: 0;
  }
  /*初始状态 透明度为0*/
  25% {
      opacity: 0.25;
  }
  50%{
    opacity: 0.5;
  }
  75%{
    opacity: 0.75;
  }
  100% {
      opacity: 1;
  }
  /*结束状态 透明度为1*/
}

@-webkit-keyframes fade-in {
  /*针对webkit内核*/
  0% {
      opacity: 0;
  }
  40% {
      opacity: 0;
  }
  100% {
      opacity: 1;
  }
}
*{
  cursor: url(../images/Arrow.cur),auto;
}
header{
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.target_SecondHtml{
  position: absolute;
  top: 54%;
  left: 37%;
  font-size: 40px;
  color: #f1f1f1;
  text-decoration: none;
  display: none;
}

.search-box {
  clear: both;
  position: absolute;
  top: 30%;
  left: 49%;
  transform: translate(-50%, -50%);
  background: #2f3640;
  height: 40px;
  border-radius: 40px;
  padding: 10px;
}

.search-btn {
  color: #e84118;
  float: right;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #2f3640;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: 0.4s;
  text-decoration: none;
}
.qrcode img {
  position: absolute;
  display: block;
  left: 40%;
  top: 10%;
}

.qrcode {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  display: none;
}

.search-txt {
  border: none;
  background: none;
  outline: none;
  float: left;
  padding: 0;
  color: white;
  font-size: 16px;
  transition: 0.4s;
  line-height: 40px;
  width: 0;
}

.search-box:hover>.search-txt {
  width: 240px;
  padding: 0 6px;
}

.search-box:hover>.search-btn {
  background: white;
}

.stars {
  transform: perspective(500px);
  transform-style: preserve-3d;
  position: absolute;
  bottom: 0;
  perspective-origin: 50% 100%;
  left: 50%;
  animation: rotate 90s infinite linear;
}

.star {
  width: 2px;
  height: 2px;
  background: #F7F7B6;
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0 -300px;
  transform: translate3d(0, 0, -300px);
  backface-visibility: hidden;
}

.middle {
  position: absolute;
  top: 70%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.btn {
  display: inline-block;
  width: 90px;
  height: 90px;
  background: #f1f1f1;
  margin: 10px;
  border-radius: 30%;
  box-shadow: 0 5px 15px -5px #00000070;
  color: #3498db;
  overflow: hidden;
  position: relative;
  text-align: center;
}

.btn i {
  line-height: 90px;
  font-size: 26px;
  transition: 0.2s linear;
}

.btn:hover i {
  transform: scale(1.3);
  color: #f1f1f1;
}

.btn::before {
  content: '';
  position: absolute;
  width: 120%;
  height: 120%;
  background: #3498db;
  transform: rotate(45deg);
  left: -110%;
  top: 90%;
}

.btn:hover::before {
  animation: flash 0.7s 1;
  top: -10%;
  left: -10%;
}

.myicon{
  position: absolute;
  top: 38%;
  border-radius: 50%;
  left: 46%;
  width: 120px;
  height: 120px;
  border: 1px #ffff solid;
}


@keyframes rotate {
  0% {
      transform: perspective(400px) rotateZ(20deg) rotateX(-40deg) rotateY(0);
  }

  100% {
      transform: perspective(400px) rotateZ(20deg) rotateX(-40deg) rotateY(-360deg);
  }
}

@keyframes flash {
  0% {
      left: -100%;
      top: 90%;
  }

  50% {
      left: 10%;
      top: -30%;
  }

  100% {
      left: -10%;
      top: -10%;
  }
}